After Héctor Santiago’s start Sunday, which raised his ERA to 3.48 on the season, I asked him about his sinker, since according to Statcast, he threw it and his changeup almost exclusively.

It turns out Santiago doesn’t throw a sinker. I felt bad.

In advance of his home start against the Twins on Saturday, Santiago chatted about the four-seam fastball that’s powered his eight-year major league career, but was unpredictable and slow when he battled a back injury last season. He also explained why this pitch gets mistaken for a sinker.

James Fegan: Does the four-seamer just get sinking movement on it or does it vary?

Santiago: Yeah, I think that’s why it’s kind of like a different pitch. I get a lot of swings and misses on it because it kind of moves around a lot. You’re not the first person that said I throw a sinker, so I always try to clarify that. Like I said, it’s funny I looked up at the scoreboard and it saw...